Pitman for stone-crushers



(No Model.)

T. A. BLAKE. PITMAN FOR STONE GRUSHERS.

619. Patented June 29, 1886.

' 3 1 543030 152 gfov e.

lhvrrnn *rns PITMAN FOR STONE CRUSHERS.

fiPECIFIGATION forming part of Letters Patent No. 3&4,619, dated June 29, 1885.

Application filed December 21,1885

To all whom it may concern.-

Be it known that I, THEODORE A. BLAKE, of New Haven, in the county of New Haven and State of Connecticut, have invented new Improvements in Pitmen for StoneCrushers; and I do hereby declare the following, when taken in connection with the accompanying drawings and the letters of reference marked thereon, to be a f all, clear, and exact descrip tion of the same, and which said drawings constitute a part of this specification, and represent, in

Figure 1, an edge view of the pitman; Fi 2, a side view; Fig. 3, a vertical central section through the crank-pin opening andlubrieating-chamber.

This invention relates to an improvement in the construction of pitmen, with special reference to the stone-crushing maehinek nown as the Blake Crusher. In that machine the power is applied to the pitman in one direction only-that is, in closing or forcing the jaws together, the return of the jaws being produced by a spring independent of the pitman. The entire force, coming as it does upon one side of the bearing in the pitman, ereates great friction and wear, and is difficult to lubricate, and,beeause of the lack of such proper lubrication, friction and wear is greatly increased.

lhe object of my invention is to provide a means of lubrication such as will insure a con stant supply for the bearing in the pitman; and it consists in constructing the pitman with a chamber in that side of the crank -pin opening opposite where the erank pin takes its bearing, and with an aperture through the side of the pitman into the said chamber, and whereby the said chamber may be f lled with an absorbent material adapted to hold lubrieating material in suspense, and so that the crank-pin working against the said absorbent material will take therefrom lubrication for its bearing in the pitinan and as more fully hereinafter described.

A represents the pitman, which is of usual form employed in stone-crushers; B, the eccentric or crank-pin opening; (J C, the bearings for thetoggle.

Serial No. 186,394. (No model.)

Below the opening Bin the pitman a chamber, D, is formed, preferably in width equal to the full diameter of the opening B, and extending longitudinally nearly to the edges of the pitman, as indicated in broken lines, Fig. 2. The chamber D communicates directly with the opening B. From the chamber D a passage, (1, is formed, preferably in the form of a slot in the side of the pitman and in clined downward into the chamber, the opening into the passage from the outside being above the center of the cranlepin opening B. The chamber D is filled with any suitable absorbent-as sponge, waste or like material through the passage a-and should be so as to bring the upper surface into close contact with the erankpin in the opening B, and so thut the crank-pin revolving will rub upon thenppcr surface of the material in the chamber. This absorbent is thoroughly saturated with any suitable lubricant introduced through the passage a, and may be replenished as occasion requires. moved through the passage a, without detaching the pitman from the crank-pin or eccentric,by an instrument adapted to be introduced through the passage a to grasp the absorbent material and withdraw it.

In operation the revolving crank-pin takes from the absorbent the lubricant sufficient to lubricate the bearing, and thereby insure the proper working of the crank-pin in its bearing, and a large proportion of the wear on the pitman will be consequently avoided.

I claim-- The hereiadescribed pitman for stone-crush ers, constructed with an opening, B, for the crank-pin or eccentric, with a chamber, D, from said. opening on the side of the opening opposite the bearing, and with a passage, to, eX- tending from said chamber outward, substantiall y as described.

THEODORE A. BLAKE.

Vi tnesses:

J OHN E. EARLE, FRED O. EARLE,

The absorbent itself may be re- 

